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Fuller Picture of Human Expansion from Africa
ScienceDaily (Oct. 22, 2012) — A new, comprehensive review of humans' anthropological and genetic records gives the most up-to-date story of the "Out of Africa" expansion that occurred about 45,000 to 60,000 years ago."
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Zitat:
The anthropological information can inform geneticists when they investigate certain genetic changes that emerge over time. For example, geneticists have found that genes for lactose intolerance and gluten sensitivity began to emerge in populations expanding into Europe around 10,000 years ago.
The anthropological record helps explain this: It was around this time that humans embraced agriculture, including milk and wheat production. The populations that prospered -- and thus those who survived to pass on these mutations -- were those who embraced these unnatural food sources. This, said Feldman, is an example of how human movements drove a new form of natural selection.
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Milch und Weizen als "unnatürliche Nahrungsquellen" ... wo der Verfasser recht hat, hat er recht ;-)
Wo er allerdings nicht recht hat: Es muss
lactose tolerance und nicht
intolerance heißen, denn Lactoseintoleranz nach dem Abstillen ist der genetische Normalfall in den betreffenden Populationen vor Einführung der Milchwirtschaft gewesen und ist es über das Genom der Menschheit betrachtet nach wie vor.
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